1W55
Structure of the Bifunctional IspDF from Campylobacter jejuni
Summary for 1W55
| Entry DOI | 10.2210/pdb1w55/pdb |
| Descriptor | ISPD/ISPF BIFUNCTIONAL ENZYME, MAGNESIUM ION, CYTIDINE-5'-MONOPHOSPHATE, ... (6 entities in total) |
| Functional Keywords | bifunctional enzyme, biosynthetic pathway, isoprenoids, bifunctional, nonmevalonate, transferase |
| Biological source | CAMPYLOBACTER JEJUNI |
| Total number of polymer chains | 1 |
| Total formula weight | 42791.05 |
| Authors | Gabrielsen, M.,Bond, C.S.,Hunter, W.N. (deposition date: 2004-08-05, release date: 2004-10-04, Last modification date: 2025-12-17) |
| Primary citation | Gabrielsen, M.,Bond, C.S.,Hallyburton, I.,Hecht, S.,Bacher, A.,Eisenreich, W.,Rohdich, F.,Hunter, W.N. Hexameric Assembly of the Bifunctional Methylerythritol 2,4-Cyclodiphosphate Synthase and Protein-Protein Associations in the Deoxy-Xylulose-Dependent Pathway of Isoprenoid Precursor Biosynthesis J.Biol.Chem., 279:52753-, 2004 Cited by PubMed Abstract: The bifunctional methylerythritol 4-phosphate cytidylyltransferase methylerythritol 2,4-cyclodiphosphate synthase (IspDF) is unusual in that it catalyzes nonconsecutive reactions in the 1-deoxy-D-xylulose 5-phosphate (DOXP) pathway of isoprenoid precursor biosynthesis. The crystal structure of IspDF from the bacterial pathogen Campylobacter jejuni reveals an elongated hexamer with D3 symmetry compatible with the dimeric 2C-methyl-D-erythritol-4-phosphate cytidylyltransferase and trimeric 2C-methyl-D-erythritol-2,4-cyclodiphosphate synthase monofunctional enzymes. Complex formation of IspDF with 4-diphosphocytidyl-2C-methyl-D-erythritol kinase (IspE), the intervening enzyme activity in the pathway, has been observed in solution for the enzymes from C. jejuni and Agrobacterium tumefaciens. The monofunctional enzymes (2C-methyl-D-erythritol-4-phosphate cytidylyltransferase, IspE, and 2C-methyl-D-erythritol-2,4-cyclodiphosphate synthase) involved in the DOXP biosynthetic pathway of Escherichia coli also show physical associations. We propose that complex formation of the three enzymes at the core of the DOXP pathway can produce an assembly localizing 18 catalytic centers for the early stages of isoprenoid biosynthesis. PubMed: 15466439DOI: 10.1074/JBC.M408895200 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.3 Å) |
Structure validation
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